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fix axiomatization for at

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-01-18 12:01:15 +05:30
parent 6aed3c3a44
commit c9373ebc9f
2 changed files with 3 additions and 3 deletions
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4
src/smt/theory_seq.cpp
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@ -1987,8 +1987,8 @@ void theory_seq::add_at_axiom(expr* e) {
expr* s, *i;
VERIFY(m_util.str.is_at(e, s, i));
expr_ref x(m), y(m), lx(m), le(m), xey(m), zero(m), one(m), len_e(m), len_x(m);
x = mk_skolem(m_at_left, s);
y = mk_skolem(m_at_right, s);
x = mk_skolem(m_at_left, s, i);
y = mk_skolem(m_at_right, s, i);
xey = mk_concat(x, e, y);
zero = m_autil.mk_int(0);
one = m_autil.mk_int(1);